My reaction to this marvelous video was not at all what I expected. As someone who has been supportive of transhumanism for decades, i expected to find the beautiful, appealing future world portrayed as irresistibly attractive. Instead, I found myself profoundly alienated from it. It's always good to learn how difficult it is to step outside of your own time, culture and upbringing.

It would be interesting for someone to attempt to develop a theory that allows humans to 'reverse' or 'undo' changes they make to themselves and, collectively, to civilization.

It seems that true liberation may require the ability to easily pursue alternate paths as our preferences change and as we learn from our mistakes. Perhaps, changes that are reversible with minimal costs should be awarded a special ethical status and be openly preferred during deliberations about possible future scenarios.

Good observation rmk948. I'm sure many going through the coming cultural changes, with one foot in the "old" world and one in the new, will experience disorientation; that needs to be understood as longevity makes such "world bridging" the norm in people's lives.

This reminds me of a most excellent bio on Henry Ford recently aired on U.S. PBS [http://www.pbs.org/wgbh/americanexperience/films/henryford/player/]. Bottom line: he was a Victorian-era gentleman thrust into a very strange new world that he, especially in his later years, wasn't able to accept. (Paradoxically, he himself was a major factor in ushering in that new world!)